The red blood cells in a blood sample grows by 10% per hour

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The red blood cells in a blood sample grows by 10% per hour in first two hours, decreases by 10% in next one hour, remains constant in next one hour and again increases by 5% per hour in next two hours. If the original
count of the red blood cells in the sample is 40000, find the approximate red blood cell count at the end of 6 hours.

1. 40000
2. 45025
3. 48025
4. 50025

Correct Option: C

Number of blood cells in first 6 hours

= 40000		1 +	10		²		1 -	10			1 +	5		²
			9					9				9

= 40000 ×	11	×	1	×	9	×	21	×	21	= 480249 ≈ 48025
	10		10		10		20		20